Quarterly report pursuant to Section 13 or 15(d)

Equity Instruments - Warrants, Fair Value Assumptions (Details)

v3.21.2
Equity Instruments - Warrants, Fair Value Assumptions (Details) - Redeemable convertible preferred stock warrants
Sep. 30, 2021
Sep. 30, 2020
Expected volatility | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrant, measurement input 0.300 0.350
Expected volatility | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrant, measurement input 0.400 0.450
Risk-free interest rate | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrant, measurement input 0.001 0.001
Risk-free interest rate | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrant, measurement input 0.010 0.008
Dividend yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrant, measurement input 0 0